Improvement in concrete pavements



STATES To all whom it may concern.

' Be it known that I, ANTONIO PELLETIER, of Washington, in the county ofWashington and District of Columbia, have invented. certain Improvementsin Pavements, of which the following is a specification.

My invention consists in novel compounds or compositions for the baseand the surface. In proceeding to lay my pavement I first grade and rollthe ground, and then place I: thereon, preferably-in. two successivelaycrs,a base or foundation prepared in the following manner: I firstprepare an insoluble oxychloride by treating any separable soluble orinmetals. Inext provide si (1 broken stone or -ravel,"or both, and "h assul hate gmjpg or other cheap salts of alunnnaor a s minerals such asfur- "min;- the same with the aluminous materi ls, the stone and gravel,and the oxide above mentioned, the materials being finely pulverized andthe mixing effected while they are all in a thoroughly dry state. Theagitation of the materials is to be carried on by hand or machineryuntil they are thoroughly andevenly mingled, after which water iscarefully added and the agitation continued until the compound isreduced to a plastic or semi-fluid mass of uniform consistency, specialcare be- -ing taken to avoid an excess of water, the effect of whichwould be to destroy the strength and hardness of the material when set.

= The material or beton thus prepared is placed .in two or more layersupon the ground, and each layer thoroughly beaten and compacted,immediately upon being laid down, by means of ramme'rs or heaters havinga percussive action. V When the base or foundation has become finel Amsiev u nsetlnrleeertter w Ime-or cement, and sil ieions -sand, oxide ofiron, anda chloride either ol' ron, manganese, or calcium. 5.

. 2. In a'concretepavement, as a substitute for oxides and chlorides,the equivalent hie-- allic salts, as herein specifiedq',v '5' f -*3. Ina concrete pavement, the aluminous fsalts, minerals, or slags,' 'incombination with Specification forming part of tea; Patent No. 221,096,time October 28, 1879;

January 10, 18 77 soluble oxide with the correspouihn 'chr'oi'uile,using, pre erably, e 0x11 es 0 e leavy 2 2 g rni iria "ANTONIOPEYLLETIER, or wrisnrne'ron, DISTRICT or COLUMBIA.

IMPROVEMENT IN CONCRETE PAVEMENTS.

application filed cushion layer composed of pure dry silicious sand orgravel mixed with pure bitumen. This 'layer, being rolled down smoothlyin place, forms a permanently elastic or yielding cushion, and servesboth to prevent the surface layer from cracking or crushing under heavypressure, and also, by allowing the surface to yield slightly, toovercome the objections urged against the ordinary solid unyieldingpavements, which are a prolific source of disease among the horsesdriven constantly over them.

The top or surface coating or superstructure, of one, two, or moreinches in thickness, is prepared as follows: Take of purified Cuban ashalt or bitumen fifteen parts; arbonate of Ime or o I l 'l' geaiigscfial-as es or any snm ar car onaceous a er, y par s; clean sharp sgngabout two hundred parts; on e 0 iron 1 e parts. p

The ingredients, men, which are tb to be'fhoroughly' f driers of anysumstruc 1o and while. hot are thoroughly mixed with the melted asphaltor bitumen,'and at the same time one part of chloride added andincorporated in the mass a chloride of iron or c i 0;, man anese Wag tot he' cli; I 'Tnammie location in which the pavement is laid. In coldclimates it is best to use chloride of calcium to act upon the limeybutin hot climates it is best to employ chloride of iron or of manganese toact upon the oxide of iron. The surface layer, after being laid down inplace, is leveled and finished while hot by a heavy roller or by heatediron tamps or it may be pressed or molded into blocks of any suitablesize, and thus laid. v

I do not claim the insulating or non-adhesive layer located immediatelybelow the top orsurface'layer, and it is to be distinctly unders'toodthat nothing herein contained is to be construed as a claim thereto. I 1

Having thus described my invention, what I claim is- V 1. Ina concretepavement, the combination 1 of broken stone orzgravel, or' both, withhy- 2'iO9o.-. i

a concrete pavement-,the combination I carbonate of lime, or thespecified equivalent, 1 talcose silicate, coal-ashes, and a metallic ozrV 'wi tnessesi lime and salts of alumina-{as specified.

draulic lime 9f tiel,?1 rra-alba, or hydraulic 7' of-..pnre asphalt or;bitumen, silicious sand,

ide and chloride, as specified. I Q, ANTONIO .rnnnnrinn.

P. T. Deni I W. DODGE.

